my mum has the exact same symptoms as you feeling very bloated and full of food despite the fact she is hardly eating... the nausea is now really debilitating her and yet bar a small stone in her gallbladder they can find no reason for these feelings...
She is back at her consultants tomorrow to see what he can do as so far no meds are working..
but what is interesting is talking to a woman at work who had her gall baldder removed 3 months ago- and she is feeling exactly the same as you ... in fact she says the pain is as bad as when she had her stones and she does not feel like the operation was worth it...
she is back at docs soon so will ask her...
Hope you feel better soon as it sounds awful